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3 years ago

How many moles of atoms are in 5.00 g of 13C

Chemistry

1 answer:

Illusion [34]3 years ago

7 0

Mr = 13 g / mol
mass = 5 g
Mol = 5/13 mol :)

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Part a use these data to calculate the heat of hydrogenation of buta-1,3-diene to butane. c4h6(g)+2h2(g)→c4h10(g)

Reptile [31]

Answer: The heat of hydrogenation of the reaction is coming out to be 234.2 kJ.

Explanation:

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. It is represented as $\Delta H$

The equation used to calculate enthalpy change is of a reaction is:

$\Delta H_{rxn}=\sum [n\times \Delta H_{(product)}]-\sum [n\times \Delta H_{(reactant)}]$

For the given chemical reaction:

$C_4H_6(g)+2H_2(g)\rightarrow C_4H_{10}(g)$

The equation for the enthalpy change of the above reaction is:

$\Delta H_{rxn}=[(1\times \Delta H_{(C_4H_{10})})]-[(1\times \Delta H_{(C_4H_6)})+(2\times \Delta H_{(H_2)})]$

We are given:

$\Delta H_{(C_4H_{10})}=-2877.6kJ/mol\\\Delta H_{(C_4H_6)}=-2540.2kJ/mol\\\Delta H_{(H_2)}=-285.8kJ/mol$

Putting values in above equation, we get:

$\Delta H_{rxn}=[(1\times (-2877.6))]-[(1\times (-2540.2))+(2\times (-285.8))]\\\\\Delta H_{rxn}=234.2J$

Hence, the heat of hydrogenation of the reaction is coming out to be 234.2 kJ.

4 0

3 years ago

Clouds are formed by the ________ water

tatuchka [14]

Clouds are made of water. When water evaporates it turns into clouds. So, I think the answer is EVAPORATED water.

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3 years ago

Some species of hares are brown most of the year, but change color to white in the winter. This allows them to blend in

muminat

Answer:

Deciduous forests

Explanation:

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2 years ago

As the energy of the molecules increases, the motion of the molecules _______.

Alexus [3.1K]

Answer:

the motion of molecules increases

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2 years ago

What inner planet has enough gravity to hold on to all its gases

Viefleur [7K]

The earth has enough gravity to do that

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3 years ago

Read 2 more answers